Fig. 1From: Regulatory T lymphocyte infiltration in metastatic breast cancer—an independent prognostic factor that changes with tumor progressionImmunohistochemical stainings of primary tumors. a CD3, a marker for T lymphocytes. b FOXP3, a marker for regulatory T lymphocytes. c CD68, a marker for macrophages. d NE, a marker for neutrophils. Scale bar = 200 μm. Black arrows indicate immune cellsBack to article page